Do you live in an area with hot summers and is having trouble starting your weed eater?
If so, you’re not alone — when it gets too hot, some weed eaters just don’t want to cooperate. Fortunately, there’s good news: no matter how hot it is outside, fixing a weed eater that won’t start isn’t all that difficult if you have the right tools and approach.
In this weed eater repair guide we’ll provide expert advice on how to fix a weed eater that won’t start because of heat – so keep reading for step-by-step tips on fixing your lawn care struggles!
In This Guide
Causes of Heat-Related Problems With Weed Eaters
Here are a few of the most common causes to keep an eye out for while using your weed eater.
Engine Oil Deterioration
Engine oil problems are common cause of overheating in any kind of engine. When engine oil starts to break down from heat, it loses its ability to lubricate and protect the internal parts of the engine. This can lead to grinding, sticking, and friction which then causes more heat build-up.
Need More Weed Eater Engine Oil?
The Briggs & Stratton SAE 30 30W Engine Oil is a 48-ounce bottle of high-quality detergent oil designed for air-cooled 4-cycle engines. Specially formulated for higher operating temperatures, it meets original equipment specifications and is recommended for lawn mowers and other small engine equipment.
Weed eaters typically use a 2 stroke gasoline engine with a carburetor. Fuel vapors can easily escape from the carburetor, causing the fuel to lose its combustibility. Once this happens, your weed eater won’t start until you purge the fuel system of these vapors so it is important to maintain your carburetor.
A carburetor fuel lock can sometimes occur and prevent the engine from starting. This is usually caused by an air leak in the fuel line or a faulty carburetor float setting, both of which can be easily fixed.
Clogged Air and Fuel Filters
A clogged air filter can restrict the air flow to your engine, making it harder for it to start. Gas engine require a steady flow of fresh air so a small clog can prevent it from starting.
Clogged fuel filters can also lead to fuel starvation, which is when the engine isn’t getting enough of the right type of fuel mixture in order to run properly. Your fuel filter should be checked and replaced as needed.
Worn Spark Plugs
Another common problem that can prevent your weed eater from starting is a worn spark plug. When the electrodes on the spark plug become too thin, they won’t be able to create a strong enough spark to ignite the fuel in the engine. This can make it difficult or even impossible to start – you may be able to start it a few times, but won’t be able to consistently start the motor.
Fuel Cap Problems
If the fuel cap is too tight the vapor won’t be able to exit. Try loosening the fuel cap then attempt to start the weed eater, this may be all it takes to get the motor running again.
How to Fix a Weed Eater That Won’t Start Due to Heat
Step 1: Make sure you have gas in the engine – if there’s no fuel, your weed eater won’t start.
Step 2: Check the air filter and replace if needed – a clogged air filter can prevent the engine from starting.
Step 3: Clean or replace the spark plug – worn spark plugs won’t create enough of a spark to ignite the fuel in the engine.
Step 4: Change the Oil in the Engine – Old engine oil can cause lots of heat build-up and make it harder for the engine to start in hot weather. Make sure to use the right type of oil and follow the instructions on how much to put in.
Step 5: Check and replace the fuel filter – Clogged or dirty fuel filters can cause fuel starvation, preventing your weed eater from starting
Step 6: Check and Replace Air Filters if Needed – Air filters can become clogged with dirt and debris, restricting the air flow to your engine. Make sure to check and replace them if needed
Step 7: Check and Replace Fuel Cap – If the fuel cap is too tight, vapor won’t be able to escape. Try loosening the fuel cap then attempt to start the weed eater.
Step 3: Clean the Carburetor and Ensure Proper Connections – A clean Carburetor is key to a working weed eater and one of the most common problems we see when a motor won’t start
Even high quality weed eaters from brands like Black and Decker and Husqvarna can overheat and fail to start after extended usage – especially on a hot day! If you are experiencing a heat-related issue with your weed eater, follow the steps above to troubleshoot and determine the cause of the problem. If you are still having trouble getting it going, get in touch with a qualified repair specialist at a local repair shop!